He has two children, Marina and Dante, both of whom are artists. Marina is a jewelry maker and Dante is a glassblower.[2] In 1998, Marioni and his son presented a feature exhibition of their glass at the Fresno Art Museum in California.[4]
His work is about human nature and is often inspired by his dreams.[9] Known as an innovator in the glass world, Marioni pushes his techniques to their limits, regularly redefining what is possible to achieve with the medium. "I work with glass for its distinct ability to capture and manipulate light. While my techniques are often inventive, they are only in service of the image," says Paul.[9]